Diversity performance analysis of four port triangular slot MIMO antenna for WiBro and ultrawide band (UWB) applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Praveen Vummadisetty Naidu ◽  
Sai haranadh Akkapanthula ◽  
Maheshbabu Dhanekula ◽  
Neelima Vummadisetty ◽  
Arvind Kumar
Keyword(s):  
Mutual Coupling ◽  
Group Delay ◽  
Mimo System ◽  
Wide Band ◽  
Cost Effective ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Mimo Antenna ◽  
Capacity Loss ◽  
Uwb Applications

Abstract This article discusses a 4-port micro-strip fed MIMO Antenna system with a triangular slot and an inverted L shape strip has been designed and analysed for both 2.3 GHz WiBro and Ultra-wide-band applications. The suggested antenna has been etched on a cost-effective epoxy (FR-4) substrate having ϵ r ${{\epsilon}}_{r}$  = 4.4 with an overall dimension of 45 × 45 × 1.6 mm3. Mutual coupling of −18 dB between the radiators has been obtained by orthogonal placement of radiators. From the simulated and practical results, the proposed compact MIMO system operates in frequency bands 2.26–2.42 GHz and 3.7–10.8 GHz respectively. The proposed small triangular MIMO system operates with an ECC less than 0.005 with an acceptable channel capacity loss <0.5 bits/s/Hz. Further, the diversity characteristics like DG, MEG, TARC, and group delay have been calculated and are presented in this paper.

scholarly journals Compact Ultra-Wide Band MIMO Antenna System for Lower 5G Bands

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Haitham AL-Saif ◽  
Muhammad Usman ◽  
Muhammad Tajammal Chughtai ◽  
Jamal Nasir
Keyword(s):  
Mutual Coupling ◽  
Return Loss ◽  
Wide Band ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Center Frequency ◽  
Mimo Antenna ◽  
Total Structure ◽  
Good Agreement ◽  
Array Geometry

This paper presents a novel compact 2 × 2 planar MIMO antenna system with ultra-wide band capability. Antenna system is specifically designed to target lower 5th generation operating bands ranging from 2 GHz to 12 GHz. This band also covers the IEEE 802.11 a/b/g/n/ac. The antenna array geometry has been simulated using CST MWS. The design is extremely miniaturized with total structure size of 13×25×0.254 mm3. The simulated and measured results have been presented. Measured and simulated return loss values for designed antenna are less than −10 dB over the operating band and lowest values of −35 dB and −32.5 dB can been seen at 5.2 GHz and 9.2 GHz, respectively, whereas at the center frequency the return loss is −25.2 dB. The mutual coupling between both elements is less than −20 dB over the transmission bandwidth. Simulated and measured radiation patterns in E and H planes at center frequency show nearly isotropic far fields. The maximum gain is measured as 4.8 dB. Promising results of Envelope Correlation Coefficient and gain diversity of the design have been achieved. Simulated and measured results are found in good agreement. The fractional bandwidth of antenna is measured as 143.2% which satisfies its ultra-wide band response.

Design of a compact MIMO antenna system with reduced mutual coupling

2014 ◽  
Vol 8 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Mohammed Younus Talha ◽  
Kamili Jagadeesh Babu ◽  
Rabah W. Aldhaheri
Keyword(s):  
Resonant Frequency ◽  
Mutual Coupling ◽  
Mimo System ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
Operating Band

A novel compact multiple-input–multiple-output (MIMO) antenna system operating from 5 to 7.3 GHz is proposed for wireless applications. It comprises of two similar antennas with microstrip feeding and radiating patches developed on a reduced ground plane. The developed antenna system resonates at a dual-band of 5.4 and 6.8 GHz frequencies, giving an impedance bandwidth of 38% (based on S11 < −10 dB). The unique structure of the proposed MIMO system gives a reduced mutual coupling of −27 dB at 5.4 GHz resonant frequency and −19 dB at 6.8 GHz resonant frequency and in the entire operating band the coupling is maintained well below −16 dB. The envelope correlation coefficient of the proposed MIMO system is calculated and is found to be less than 0.05 in the operating band. The measured and simulation results are found in good agreement.

scholarly journals Efficient Microstrip Antenna system using Reduced GP Structure for Ultra-Wide Band (UWB) Applications

YMER Digital ◽  
2021 ◽  
Vol 20 (12) ◽  
pp. 790-807
Author(s):  
N Parthiban ◽  
◽  
M Mohamed Ismail ◽  
Keyword(s):  
Frequency Band ◽  
Antenna Arrays ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Wide Band ◽  
Antenna System ◽  
Microstrip Patch Antenna ◽  
Ultra Wide Band ◽  
Microstrip Patch ◽  
Uwb Applications

Microstrip antenna is an essential choice for Ultra Wide Band (UWB) applications of its light weight, low profile and easy to form antenna arrays. However, the design of microstrip patch antenna bandwidth is greatly affects by the dielectric substrate material (FR4). In this research, the bandwidth enhancement of MPA was designed by minimizing the dimension of Defected GP (DGP) in GP for Ultra Wide Band wireless applications. But, the antenna design complexity increases with the number of an operating frequency band. In this research, the MPA was designed as small as size of 10×13×1.6 mm and operates on frequency band between 3.1GHz to 10.6GHz for VSWR less than 2. The microstrip patch antenna was designed at 3.1GHz to 10.6GHz using High-Frequency Structure Simulator (HFSS) software. The simulation result shows that the proposed microstrip patch antenna obtained <-10dB of return loss from 3.1GHz to 10.6GHz throughout the frequency range. The measured result proves that the proposed microstrip patch antenna has better characteristics to fulfill the requirements of UWB applications

scholarly journals Compact Fractal MIMO antenna for UWB applications

2021 ◽  
Vol 20 ◽  
pp. 146-151
Author(s):  
Edgar Alejandro Andrade-Gonzalez ◽  
Juan Carlos Ordoñez-Martínez ◽  
Mario Reyes-Ayala ◽  
José Alfredo Tirado Méndez ◽  
Hilario Terres-Peña
Keyword(s):  
Multiple Input Multiple Output ◽  
Wide Band ◽  
Antenna System ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Uwb Applications ◽  
Uwb Communication

In this article, a compact ultra-wide band (UWB) multiple input multiple output (MIMO) antenna system is showed. This antenna is based on fractal Fibonacci circles and operates over wide frequency range from 2.9 to 14.51 GHz. The dielectric used was Duroid substrate with dielectric constant εr = 2.2 and thickness of substrate 1.27 mm. This UWB MIMO antenna is simulated by HFSS. In order to improve the isolation between the elements of the antenna a parasitic structure is used, getting S12 and very low ECC. Also, the Total Active reflection Coefficient (TARC) was obtained. Proposed antenna can be used for UWB communication applications and its size is 64 × 38mm2

scholarly journals Mutual Coupling Reduction of E-Shaped MIMO Antenna with Matrix of C-Shaped Resonators

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Raghad Ghalib Saadallah Alsultan ◽  
Gölge Ögücü Yetkin
Keyword(s):  
Mutual Coupling ◽  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Surface Current ◽  
Antenna System ◽  
Total Efficiency ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Parallel Arrangement ◽  
Input Multiple Output

E-shaped multiple-input-multiple-output (MIMO) microstrip antenna systems operating in WLAN and WiMAX bands (between 5 and 7.5 GHz) are proposed with enhanced isolation features. The systems are comprised of two antennas that are placed parallel and orthogonal to each other, respectively. According to the simulation results, the operating frequency of the MIMO antenna system is 6.3 GHz, and mutual coupling is below −18 dB in a parallel arrangement, whereas they are 6.4 GHz and −25 dB, respectively, in the orthogonal arrangement. The 2 × 3 matrix of C-shaped resonator (CSR) is proposed and placed between the antenna elements over the substrate, to reduce the mutual coupling and enhance the isolation between the antennas. More than 30 dB isolation between the array elements is achieved at the resonant frequency for both of the configurations. The essential parameters of the MIMO array such as mutual coupling, surface current distribution, envelop correlation coefficient (ECC), diversity gain (DG), and the total efficiency have been simulated to verify the reliability and the validity of the MIMO system in both parallel and orthogonal configurations. The experimental results are also provided and compared for the mutual coupling with simulated results. An adequate match between the measured and simulated results is achieved.

Limited Size MIMO Antenna Systems and Mutual Coupling Challenge

2016 ◽  
pp. 176-202
Author(s):  
Nassrin Elamin ◽  
Tharek Rahman
Keyword(s):  
Wireless Communication ◽  
System Performance ◽  
Mutual Coupling ◽  
Mimo System ◽  
Antenna System ◽  
Limited Size ◽  
Mimo Antenna ◽  
High Data ◽  
Isolation Techniques ◽  
Antenna Systems

The wireless communication high data rate is achievable by installing more than one antenna in receiver and transmitter terminals as MIMO antenna. In order to obtain the MIMO gain (Envelope Correlation Coefficient (ECC) = 0.5), the antenna elements must be at least separated by a distance of 0.5? (? is the operating wavelength of 0.7~3.8 GHz which is the frequency range of most of the current wireless communication applications). This value is big relative to limited sizes devices. A practical MIMO antenna should have a low signal correlation between the antenna elements and good matching features for input impedance. Moreover, MIMO system performance can be improved by reducing mutual coupling between closely spaced antenna elements. Miniature high isolated MIMO antenna system has been presented in this chapter; also many MIMO antenna systems were analyzed and categorized based on the implemented isolation techniques. Furthermore several MIMO antenna evaluation methods have been discussed.

scholarly journals Reduction of Mutual Coupling in UWB/MIMO Antenna Using Stub Loading Technique

2021 ◽  
Vol 17 (1) ◽  
pp. 12-18
Author(s):  
Adamu Halilu Jabire ◽  
Anas Abdu ◽  
Sani Saminu ◽  
Sani Salisu ◽  
Abubakar Muhammad Sadiq ◽  
...  
Keyword(s):  
Mutual Coupling ◽  
Impedance Matching ◽  
Ground Plane ◽  
Surface Current ◽  
Uwb Antenna ◽  
Mimo Antenna ◽  
Capacity Loss ◽  
Measurement Results ◽  
Uwb Applications ◽  
Mutual Coupling Reduction

Abstract The research presents mutual coupling reduction between UWB-MIMO antenna elements using stub loading technique. The proposed 2 × 2 UWB antenna geometry consists of two circular-shaped monopole radiators with a partial ground for perfect impedance matching. Stubs of 20 mm × 0.2 mm are inserted between the two antenna elements in the ground plane to improve the isolation. The decoupling stub leads to a mutual coupling reduction of less than 20 dB. The farfield measurement at a selected frequency of 10 GHz confirms an omnidirectional radiation pattern. Different MIMO antenna metric such as channel capacity loss (CCL), mean effective gain (MEG), total active reflection coefficient (TARC), envelope correlation coefficient (ECC), and surface current are presented. Details of the design considerations and the simulation and measurement results are presented and discussed. The proposed MIMO antenna array can be well suited for UWB applications.

scholarly journals Design of a Compact Dual-Band MIMO Antenna System with High-Diversity Gain Performance in Both Frequency Bands

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 383
Author(s):  
Wazie M. Abdulkawi ◽  
Waqar Ahmad Malik ◽  
Sajjad Ur Rehman ◽  
Abdul Aziz ◽  
Abdel Fattah A. Sheta ◽  
...  
Keyword(s):  
Channel Capacity ◽  
Frequency Band ◽  
Wide Band ◽  
Antenna System ◽  
Dual Band ◽  
Frequency Bands ◽  
Mimo Antenna ◽  
Capacity Loss ◽  
Lower Frequency Band ◽  
Code Division Multiple

A compact four-element dual-band multiple-input and multiple-output (MIMO) antenna system is proposed to achieve high isolation and low channel capacity loss. The MIMO antenna was designed and optimized to cover the dual-frequency bands; the first frequency band is a wide band, and it covers the frequency range of 1550–2650 MHz, while the other frequency band covers the 3350–3650 MHz range. The measured wide-band impedance bandwidths of 1.1 GHz and 300 MHz were achieved in the lower and upper frequency bands, respectively. The proposed structure consists of four novel antenna elements, along with a plus-sign-shaped ground structure on an FR4 substrate. The overall electrical size of the whole dual-band MIMO antenna system is 0.3λ(W) × 0.3λ(L) × 0.008λ(H) for the lower frequency band. It achieved greater than 10 and 19 dB isolation in the lower and upper frequency bands, respectively. The antenna system accomplished an envelope correlation coefficient of |ρ|≤0.08 in the lower frequency band, while it achieved |ρ|≤0.02 in the higher frequency band. The computed channel capacity loss remained less than almost 0.4 bits/s/Hz in both frequency bands. Therefore, it achieved good performance in both frequency bands, with the additional advantage of a compact size. The proposed MIMO antenna is suitable for compact handheld devices and smartphones used for GSM (Global System for Mobiles), UMTS (Universal Mobile Telecommunications Service), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), 5G sub-6 GHz, PCS (Personal Communications Service), and WLAN (wireless local area network) applications.

scholarly journals A four-element UWB MIMO antenna using SRRs for application in satellite communications

2021 ◽  
Vol 11 (4) ◽  
pp. 3154
Author(s):  
Chafai Abdelhamid ◽  
Hedi Sakli ◽  
Nizar Sakli
Keyword(s):  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Wide Band ◽  
Satellite Communications ◽  
Separation Distance ◽  
Ultra Wide Band ◽  
Mimo Antenna ◽  
Double Ring ◽  
Antenna Performance ◽  
Input Multiple Output

This paper proposes a method for designing a new <em>ultra wide band</em> (UWB) multiple-input multiple-output (MIMO) antenna with two and four elements. First we presented an ultra-wide band antenna we studied these performances. Then, we studied the application of metamaterials to the design of MIMO antennas for miniaturization and the performance of antennas, in order to guarantee the proper functioning of the MIMO system with a much reduced separation distance between the radiating elements (λ/12), where the coupling can be very weak. The application of these circular double ring SRRs materials on the front plan of the antenna has contributed to the increasing of the antenna performance is studied in terms of S-Parameters, efficiency, diversity gain (DG), radiation properties and envelop correlation coefficient (ECC). It offers advantages such as the reduction of weight and congestion that is beneficial for their integration into satellite communications systems.

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